Define not working. Does it start? Does the consumption not change? How are you allocating more memory? How much memory do you have available? Did you keep track of the memory usage over time, monitoring it somehow?
It's built in Java, it is using a lot of memory indeed.

This. Keep the plug connected, but the switch turned off. Helps with grounding yourself to the case. Not that it matters too much, but it's not that difficult either.
As for other devices - meh. If they're not blocking in any way, why bother.

They all are quite capable and well-performing coolers. Air coolers are usually slightly more quiet (no pump noise), but have ever so slightly higher temps (I went from H110i GT to NH-D15 when I still had a PC).
Temps depend on how far you push it (and how well binned the CPU is).
Noise depends on how much you can tolerate while keeping great temps.

If you purchased a Windows 10 key
- Just use the phone activation method and your key will be made available, so that you can use it with the new hardware
If you upgraded to W10 and got the free upgrade
- That was free upgrade and key is linked to the hardware. If you upgrade, you likely have to buy the key as well.
Alternative is if you had the key linked to your MS account, then it is easier to transfer it over.

Adding to what others said:
- Most frequently used data is cached for quick access.
- They use data centers and CDN all over the world for quick access from any spot in the world.
- There are no "Google Maps" servers. Google has very large infrastructure they use for all their products (Maps, Gmail, YouTube, Google+, Earth, Drive etc) and even provide some of these resources to others (Google Cloud Platform).
- They use highly optimised and well-thought algorithms and tools to store the data and search through them in a matter of milliseconds.

If any of these happens, you must change your AIO:
- Your AIO leaks
- Pump stops working
- You're tired of the AIO pump noise
- You suddenly enjoy air coolers more
- You are changing case to one that does not fit your current AIO
- You want more radiator space than current AIO has
- You want better temps than your current AIO can do
- You accidentally break a rib in the radiator, causing it to leak...
- or look very bad
- The AIO logo on the pump got boring
- You are selling your PC

https://support.discordapp.com/hc/en-us/articles/210298617-Markdown-Text-101-Chat-Formatting-Bold-Italic-Underline-
Discord supports full Markdown, so it is likely something from the Markdown syntax. Something like blockquote maybe. Above is just a short tutorial.

Why can't you? What's stopping you? Do you get electrocuted? We need details.
What happens when you press the button? Does it not turn on? Does it turn on and immediately off? Does a motherboard show an error code? Have you made any hardware changes besides testing different board?